Pilot Decimo Vanishing Point, TWSBI Diamond 580AL, and Delta Dolcevita

I go over the recent additions to the pen family that include a Pilot Decimo Vanishing Point, a TWSBI Diamond 580AL, a Delta Dolcevita, a replacement Aihao, a Lamy Vista, and another Esterbrook. I compare the TWSBI 580 with the Eco.